1-(adamantylmethyloxy) - 2 - hydroxy-3-substituted amino propanes and acid addition salts thereof

ABSTRACT

ASAMANTANE DERIVATIVES HAVING THE FOLLOWING GENERAL FORMULA:   1-(R1-N(-R2)-CH2-CH(-OH)-CH2-O-CH2-)-ADAMANTANE   AND THEIR PHARMACEUTICALLY ACCEPTABLE ACID ADDITION SALTS ARE USEFUL AS SYMPATICLOYTIC, MYOLITIC, ANALGESIC AND, PARTICULARLY, AS LOCAL ANESTHETIC AND B-ADRENERGIC BLOCKING AGENTS. THE NOVEL COMPOUNDS ARE PREPARED STARTING FROM 1-HYDROXY-METHYL-ADAMANTANE THROUGH THE NEW INTERMEDIATE 1-(ADAMANTYL-METHYLOXY) -2,3- EPOXYPROPANE.

United States Patent 3,663,617 l-(ADAMANTYLMETHYLOXY) 2 HYDROXY-3- SUBSTITUTED AMINO PROPANES AND ACID ADDITION SALTS THEREOF Andrea Pedrazzoli, Milan, and Leone DallAsta, Pavia, Italy, assignors to Societe dEtudes de Recherches et dApplications Scientifiques et Medicales E.R.A.S.M.E., Paris, France No Drawing. Filed June 4, 1970, Ser. No. 43,582

Int. Cl. C07c 93/12 US. Cl. 26tl--563 P 7 Claims ABSTRACT OF THE DISCLOSURE Adamantane derivatives having the following general formula:

int 2 and their pharmaceutically acceptable acid addition salts are useful as sympaticolytic, myolitic, analgesic and, particularly, as local anaesthetic and B-adrenergic blocking agents. The novel compounds are prepared starting from 1 hydroxy methyl adamantane through the new intermediate l-(adamantyl-methyloxy) 2,3 epoxypropane.

III

BRIEF SUMMARY OF THE INVENTION The present invention relates to novel derivatives of adamantane having the following general formula:

3,663,617 Patented May 15, 1972 'ice and to pharmaceutically-useful salts of these compounds with inorganic or organic acids.

They have a remarkable pharmacological activity, in particular they are useful as sympathicolytic, myolitic, analgesic, and, particularly, as local anaesthetic and 5 adrenergic blocking agents.

The invention is also concerned with a compound of formula:

2 Alli-CH useful as an intermediate in the synthesis of the active products.

DETAILED DESCRIPTION ll SO CH2OCH2-CH-CH2-N\ OH R where R and R have the meaning defined above.

1 hydroxy methyl adamantane is reacted with epichlorhydrin in the presence of a catalytic quantity of concentrated sulfuric acid. The reaction is carried out at a temperature of'70l50 (1., preferably C., for a period ranging from 20 -60 hours, preferably 45 hours. At the end of the reaction the compound II thus obtained is distilled under high vacuum and then reacted under stirring with powdered anhydrous alkali hydroxide, preferably potassium hydroxide, in anhydrous ethyl ether at room temperature for a time ranging from l040 hours, preferably 25 hours.

1 '(adamantyl methyloxy) 2,3 epoxy propane, III, is obtained by distillation under high vacuum.

l-(adamantyl-methyloxy)-2,3-epoxy-propane, which is a further object of the present invention, is then reacted with the appropriate amine IV in a polar solvent, such as straight or branched, saturated or unsaturated aliphatic alcohols containing 1 to 7 carbon atoms, preferably namyl or n-hexyl alcohol, at a temperature of 50-185 C.,

preferably 135-160 C. for a time ranging from 4-30 hours, preferably 15-22 hours. For those amines having a low boiling point, the reaction is effected in an autoclave. The derivatives of Formula I are isolated in the form of the base, purified by distillation in vacuo, and can be converted into their pharmaceutically acceptable acid addition salts by reaction with the appropriate acid according to methods well known in the art.

Exemplary pharmaceutically acceptable acid addition salts are those formed with acetic, maleic, fumaric, succinic, tartaric, citric, malic, cinnamic, sulfonic, hydrochloric, hydrobromic, hydriodic, sulfuric, phosphoric and nitric acids, the hydroehlorides being particularly preferred.

The compounds of the invention are stable to light and to heat. They have sympathicolytic, myolitic, analgesic and, particularly, local anaesthetic and fi-adrenergie blocking activity and can be mixed with known pharmaceutical carriers for the produciton of pharmaceutical compositions.

PREPARATION l-(adamantylmethyloxy)-2-hydroxy-3-chloro-propane A solution of 198 g. of l-(hydroxymethyl)-adarnantane, 117 g. of epichlorhydrin and 1.2 ml. of concentrated sulphuric acid was heated at 115 C. for 45 hours. The small fraction which solidified was first distilled 011 and then the desired product, the boiling point of which is 120- 125 C. at 0.2 mm. Hg was obtained.

EXAMPLE 1 1- (adamantylmethyloxy) -2,3-epoxy-propane A suspension of 162 g. of l-(adamantyl-methyloxy)-2- hydroxy-3-chloro-propane, 1300 ml. of ethyl ether and 105 g. of powdered anhydrous KOH was agitated for 20 hours at room temperature. The mixture was filtered through porous glass and then the solvent followed by the product were distilled off. 119 g. of l-(adamantylmethyloxy)-2,3-epoxy-propane was obtained, the boliing point of which is 125-130 C./2 mm. Hg.

The infra-red spectrum in nujol gave: epoxide band at 846 (m.), 1160 ,(f.), 1250 (m.) cm.- ether band at 1100 (f.) cm.- OH band absent.

EXAMPLE 2 1-(adamantylmethyloxy)-2-hydroxy-3-isopropylaminopropane A solution of 22 g. of l-(adamantyl-methyloxy)-2,3- epoxy-propane, 15 g. of isopropylamine and 30 ml. of methanol was heated in an autoclave at 140 C. for hours.

The autoclave was cooled, the mixture was distilled under vacuum and 21.5 g. of product was obtained having a boiling point of 140-145 C./0.3 mm. Hg.

EXAMPLE 3 1- (adamantyhnethyloxy (-2-hydroxy-3.(di-sec.butylamino) -propane A solution of 27 g.of 1-(adamantyl-methoxy) -2,3-epoxypropane, 26 g. of di-sec.butylamine and 20 ml. of amyl alcohol was heated at 135 C. for 20 hours. The mixture was concentrated and distilled in vacuo and 22 g. of 1- (adamantylmethyloxy) 2-hydroxy-3-(di-sec.butylamine)- propane was obtained, the boling point of which is 160- 163 C./0.1 mm. Hg.

EXAMPLE 4 l-(adamantylmethyloxy) -2-hydroxy-3-.(2,2,5,5- tertamethyl-pyrrolidino) -propane A solution of 22 g. of 1 (adamantylmethyloxy)-2,3- epoxy propane, 25 g. of 2,2,5,5-tetramethyl-pyrrolidine and 40 ml. of n-hexyl alcohol was heated at 155 C. for 18 hours. The mixture was concentrated and distilled in vacuo and 30.5 g. of 1-(adamantylmethyloxy)-2-hydroxy- 3 (2',2',5',5'-tetramethyl-pyrrolidino)-propane was obtained, the boiling point of which is 185 C./0.3 mm. Hg. The oil dissolved in isopropanol was treated with gaseous hyrogen chloride. The product was crystallised from isopropanol to obtaind 28 g. of the hydrochloride in the form of white crystals, the melting point of which is 232-234 C.

EXAMPLE 5 By operating as described in Examples 2-4 the following compounds are obtained:

1 (adamantylmethyloxy) 2 hydroxy-3-n-butylaminopropane, B.P. l82-186 C./().05 mm. Hg (M.P. of its hydrochloride: -142 C.);

- (adamantylmethyloxy) 2-hydroxy-3-sec.butylaminopropane, B.P. 170-175 C./0.05 mm. Hg (M.P. of its hydrochloride: 129-13 1 C.)

1 (adamantylmethyloxy) 2-hydroxy-3-tert.-butylaminopropane, B.P. 142-145 C./0.5 mm. Hg (M.P. of its hydrochloride: -162 C.);

1 adamantylmethyloxy) 2-hydroxy-3-n-octylamino-propane, B.P. 190-193 C./0.05 mm. Hg

1 (adamantylmethyloxy) 2-hydroxy-3-dimethylaminopropane, B.P. 155-160 C./0.4 mm. Hg (M.P. of its hydrochloride: 138-140 C.);

1 (adamantylmethyloxy)-2-hydroxy-3-diisopropylaminopropane, B.P. -173 C./0.2 mm. Hg (M.P. of its hydrochloride 202-204 C.)

- (adamantaylmethyloxy) 2 hydroxy-3-cyclopentylamino-propane, B.P. 180-185 C./0.2 mm. Hg (M.P.

of its hydrochloride: 146-148 C.);

1 (adamantylmethyloxy) 2-hyroxy-3-cyclohexylaminopropane, B.P. 193-197 C. /0.5 mm. Hg (M.P. of its hydrochloride:208-210 C.);

1 (adamantylmethyloxy) 2-hydroxy-3-morpholin0-propane, B.P. 165170 C./0.2 mm. Hg. (M.P. of its hydrochloride:167-168 C.);

1 (adamantylmethyloxy) 2-hydroxy-3-hexamethyleneimino-propane, B.P. 170-173 C./0.2 mm. Hg (M.P. of its hydrochloride: 193-195 C.);

1 (adamantylmethyloxy)-2-hydroxy-3-(4'-methylpiperazino)-propane hydrochloride, M.P. 220 C. (dec.);

1 (adamantylmethyloxy) 2 hydroxy-3-(2,2',5',5'-

tetramethyl 2',5 dihydro-pyrrolino)-propane, B.P. 184-188 C./0.2 mm. Hg (M.P. of its hydrochloride: 240-242 C.);

1 (adamantylmethyloxy) 2 hydroxy-3-(2,2,6,6' tetramethylpiperidino)-propane, B.P. 180-185 C./0.1 mm. Hg. (M.P. of its hydrochloride: 238-239 C.); and

1 (adamantylmethyloxy 2 hydroxy 3 (2,2,6,6'-

tetramethyl-1',2,3',6 tetrahydropyridino) propane, B.P. 185-190 C./0.3 mm. Hg (M.P. of its hydrochloride: 236-238 C.).

We claim: 1. A member selected from the group consisting of (a) a compound of formula:

wherein R is hydrogen or an aliphatic hydrocarbon radical having up to 8 carbon atoms and R is an aliphatic hydrocarbon radical having up to 8 carbon atoms or a cycloalkyl radical of from 4 to 7 carbon atoms, R being a cycloalkyl radical only when R is hydrogen, and (b) a pharmaceutically acceptable acid addition salt thereof.

2. A member selected from the group consisting of 1 (adamantylmethyloxy) 2-hydroxy-3-isopropylamino- 5 6 propane and a pharmaceutically acceptable acid addition References Cited salt thereof.

3. 1 (adamantylmethyloxy) 2-hydroxy-3-isopropyl- UNITED PATENTS aminopropane hydrochloride. 3,539,630 11/ 1970 52mm et a1 260563 P X ;g g fjiggggg 2 5 JOSEPH REBOLD, Primary Examiner 5. 1 (adamantylmethyloxy) 2 hydroxy-S-n-butyl- D. R. PHILLIPS, Assistant Examiner amino-propane hydrochloride.

6. 1 (adamantylmethyloxy) 2 hydroxy-B-sec-butyl- US. Cl. X.R.

amino-propane hydrochloride. 10 260239 B, 247.7 B, 293.56, 294.7 C, 268 TR, 348 R,

"(adamantY1mthY19XY) 2 hYdmXY'3'tert'butY1 501.1, 611 F; 424 244, 248, 250, 263 267, 274, 325 amino-propane hydrochloride.

i I UTED STATES PATENT @FHCE @ETEFPCATE @F QQREQTKN Patent No. 3,663,617 Dated May is; 1972 Inventoflg) Andrea Pedrazzoli and Leone DalNAsta It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 2, line 22, cancel as used herein, includes straight" and substitute --s.uch'as methyl, ethyl n-propyl,

iso-

Column 3, line cancel "butylamine" and substitute --butylamino-.

Column 4, line 5, c ahcel "hyrogen" and substitute '--hydlrogen line 6-, cancel "obtaind" and substitute obtaini 2---. v

line Cancel 'hy'roxy" and substitute --hydroxy'-.,

line "3 cancel "165170 and substitute --1s5-17o-.

Signed and sealedth is 10th clay of April 1973'.

(SEAL) Attest:

EDWARD M.FLETCHER,JR. i 1 ROBERT GOTTS'CHA'LK Attesting' Officer Commissioner of Patents FORM po-mso (IO-691 

